Oil prices rose to a four-week high as traders continued to bet that cuts from the world’s biggest exporters and the coming high-demand season are ending oversupply in the market. Light, sweet crude for May settled up 79 cents, or 1.6%, at $51.03 a barrel on the New York Mercantile Exchange, its fifth gain in six sessions. Brent crude, the global benchmark, gained $1.05, or 2%, to $54.17 a barrel on ICE Futures Europe. Both reached…